Sort receiver stage constructions by pipeline order

This is less confusing to read if the receiver stages are constructed in the
same order as they are used in the pipeline below.

Signed-off-by: Julius Volz <julius.volz@gmail.com>

notify/notify.go

@@ -330,9 +330,9 @@ func (pb *PipelineBuilder) New(
 
 	ms := NewGossipSettleStage(peer)
 	is := NewMuteStage(inhibitor)
-	ss := NewMuteStage(silencer)
-	tms := NewTimeMuteStage(times)
 	tas := NewTimeActiveStage(times)
+	tms := NewTimeMuteStage(times)
+	ss := NewMuteStage(silencer)
 
 	for name := range receivers {
 		st := createReceiverStage(name, receivers[name], wait, notificationLog, pb.metrics)